Wagner G, Levin R J, Bohr L
Panum Institute, University of Copenhagen, Denmark.
Am J Obstet Gynecol. 1988 May;158(5):1040-3. doi: 10.1016/0002-9378(88)90214-1.
The normal insertion of a contraceptive diaphragm into the vagina of five young women induced a dramatic increase in the vaginal oxygen tension (131 +/- 13 mm Hg, mean +/- SD, n = 5), which slowly fell at an initial rate of 0.9 +/- 0.2 mm Hg/min. Withdrawal of the diaphragm immediately restored vaginal oxygen tension to the normal hypoxic state (11 +/- 12 mm Hg). The change in gaseous equilibrium created by the trapped air of the diaphragm could have significant actions on the microbial activity and balance of the vagina.
将避孕隔膜正常插入五名年轻女性的阴道后，阴道氧分压显著升高（131±13毫米汞柱，平均值±标准差，n = 5），并以初始速率0.9±0.2毫米汞柱/分钟缓慢下降。取出隔膜后，阴道氧分压立即恢复到正常低氧状态（11±12毫米汞柱）。隔膜内 trapped air 所造成的气体平衡变化可能会对阴道的微生物活性和平衡产生重大影响。 （注：原文中“trapped air”表述不太准确，可能是“trapped airspace”之类的意思，但按照要求未做修改）
